Support GIT_SSH=tortoiseplink

The tortoiseplink command does not understand -batch, even though
it smells like the putty plink command that does use it.  Don't add
-batch if GIT_SSH is tortoiseplink.

Change-Id: I638532a02faa2caf8c39d482094e7ff4f4ec7e78
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

org.eclipse.jgit/src/org/eclipse/jgit/transport/TransportGitSsh.java

@@ -308,7 +308,7 @@ public class TransportGitSsh extends SshTransport implements PackTransport {
 
 			List<String> args = new ArrayList<String>();
 			args.add(ssh);
-			if (putty)
+			if (putty && !ssh.toLowerCase().contains("tortoiseplink"))
 				args.add("-batch");
 			if (0 < getURI().getPort()) {
 				args.add(putty ? "-P" : "-p");